Are they just the bits and pieces to use as you work through the Lessons?

I have copied the contents of the DVD to my PC. Yesterday the lesson files within each lesson folder had the pinkish PP logo today they have the greenish AU logo for Audition which I have on my PC but have not yet opened.

The folder for Lessons has the lesson files from 01 to 18.

If I click on say lesson 02 this boots up Audition.

In Audition there is a dialogue box showing ‘Lesson 02.proproj. It is preceded by a red circle with a white cross. The ‘details’ below the warning say “The byte stream type of the given URL is unsupported. I click ‘OK’ and nothing comes up.

I did a ‘Chat’ with Adobe but they just re-directed me to Forums and Support.

I went to the webpage for the publisher Peachpit and followed a lead about FAQ.

“How do I launch the video in Windows?

This DVD-ROM can be viewed in your computer using the Firefox web browser version 22 (or later) running in Windows Vista (or later), but it will NOT work in DVD player software or in a DVD set-top player. Pop-ups must be enabled for this disc in order for it to run (instructions below).

If you try to use a different browser (including Internet Explorer), the program will not run and you will be instructed to install a different browser.

To launch the course if AutoPlay is enabled:

Insert the DVD into your computer’s DVD drive.

If the AutoPlay window (shown) is displayed, click "Run autostart.exe" to begin the course.

To launch the course if AutoPlay is turned off:

Insert the DVD into your computer’s DVD drive.

Close the AutoPlay window, if it appears.

Go to Start > Computer, and in the menu that appears right-click on your DVD-ROM drive.

Click Open to display the contents of the disc.

Double-click the file named autostart.exe to launch the course”

Assuming that the penny has dropped and that I can stop searching for what I shall never find, when I click on a Lesson should all I expect is for that to boot up PR?

I think that I should now remove the Lessons and copy it onto the PC again?

The relevant section you are referring to is from LEARN By VIDEO and not Classroom in a Book. They are two different things. The first mentioned are indeed video tutorials. Classroom in a book is a learning book accompanied with a dvd with project files and assets for you to use.